i have figured out its not the graphic card i bought the computer used and on the board graphic card didnt work so the person put a graphic card but its the brown salot that doesnt work anymore beacause the card works in my other computer so do i need to buy a new motherboard im really comfused

You are a computer nerd aren't you... There is a silver "button" battery on the motherboard. Remove this battery and unplug the computer from the wall outlet. Wait a few minutes and put the battery back in and turn on the computer. If you can't do this yourself, get a friend that knows computers to do it for you...